66565246612 has 12 divisors (see below), whose sum is σ = 116521736436. Its totient is φ = 33273321920.

The previous prime is 66565246607. The next prime is 66565246637. The reversal of 66565246612 is 21664256566.

It can be written as a sum of positive squares in 2 ways, for example, as 25435784196 + 41129462416 = 159486^2 + 202804^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2309233 + ... + 2337880.

It is an arithmetic number, because the mean of its divisors is an integer number (9710144703).

Almost surely, 2^66565246612 is an apocalyptic number.

It is an amenable number.

66565246612 is a deficient number, since it is larger than the sum of its proper divisors (49956489824).

66565246612 is a wasteful number, since it uses less digits than its factorization.

66565246612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4650698 (or 4650696 counting only the distinct ones).

The product of its digits is 3110400, while the sum is 49.

The spelling of 66565246612 in words is "sixty-six billion, five hundred sixty-five million, two hundred forty-six thousand, six hundred twelve".